18/09/2026
Sketching a Quadratic Function: Step-by-Step Graphing Tutorial
This video demonstrates how to sketch the graph of a quadratic equation written in factored form. Key Steps Covered:Finding the x-intercepts: Setting the equation to zero identifies the two x-intercepts on the graph at negative one and positive one. Finding the Vertex: Calculating the midpoint between the x-intercepts gives the center line, and substituting this back into the equation reveals the turning point at zero, negative three. Determining the Parabola Direction: Because the multiplier in front is positive, the graph curves upward into a U-shape. Plotting the Graph: The points are plotted on the coordinate plane, and a smooth parabola is drawn through the roots and the vertex.